#!/usr/bin/lua

require "nixio"
require "luci.util"
require "luci.sys"
local ntm = require "luci.model.network".init()
local type = arg[1]
local rv = {}
local wan, wan6

if not type then os.exit(0) end

if pcall(function() local x = ntm:get_wannet(); local y = ntm:get_wan6net(); end) then
	wan = {}
	wan6 = {}
	wan[1] =  ntm:get_wannet()
	wan6[1] = ntm:get_wan6net()
elseif pcall(function() local x = ntm:get_wan_networks(); local y = ntm:get_wan6_networks(); end) then
	wan = ntm:get_wan_networks()
	wan6 = ntm:get_wan6_networks()
else
	os.exit(0)
end

if wan then
	rv.wan = {}
	for i = 1, #wan do
		rv.wan[i] = {
			ipaddr  = wan[i]:ipaddr(),
			gwaddr  = wan[i]:gwaddr(),
			netmask = wan[i]:netmask(),
			dns     = wan[i]:dnsaddrs(),
			expires = wan[i]:expires(),
			uptime  = wan[i]:uptime(),
			proto   = wan[i]:proto(),
			ifname  = wan[i]:ifname()
		}
	end
end

if wan6 then
	rv.wan6 = {}
	for i = 1, #wan6 do
		rv.wan6[i] = {
			ip6addr   = wan6[i]:ip6addr(),
			gw6addr   = wan6[i]:gw6addr(),
			dns       = wan6[i]:dns6addrs(),
			ip6prefix = wan6[i]:ip6prefix(),
			uptime    = wan6[i]:uptime(),
			proto     = wan6[i]:proto(),
			ifname    = wan6[i]:ifname()
		}
	end
end

if type == "dns" then
	if wan then
		for o = 1, #(rv.wan) do
			for i = 1, #(rv.wan[o].dns) do
				if rv.wan[o].dns[i] ~= rv.wan[o].gwaddr and rv.wan[o].dns[i] ~= rv.wan[o].ipaddr then
					print(rv.wan[o].dns[i])
				end
			end
			print(rv.wan[o].gwaddr)
		end
	end
end

if type == "dns6" then
	if wan6 then
		for o = 1, #(rv.wan6) do
			for i = 1, #(rv.wan6[o].dns) do
				if rv.wan6[o].dns[i] ~= rv.wan6[o].gw6addr and rv.wan6[o].ip6addr then
					print(rv.wan6[o].dns[i])
				end
			end
			print(rv.wan6[o].gw6addr)
		end
	end
end

if type == "gateway" then
	if wan then
		for o = 1, #(rv.wan) do
			print(rv.wan[o].gwaddr)
		end
	end
end

if type == "gateway6" then
	if wan6 then
		for o = 1, #(rv.wan6) do
			print(rv.wan6[o].gw6addr)
		end
	end
end

if type == "dhcp" then
	if wan then
		for o = 1, #(rv.wan) do
			if rv.wan[o].proto == "dhcp" then
				print(rv.wan[o].ifname)
			end
		end
	end
	if wan6 then
		for o = 1, #(rv.wan6) do
			if rv.wan6[o].proto == "dhcpv6" then
				print(rv.wan6[o].ifname)
			end
		end
	end
end

os.exit(0)